Mechanical movement



(No Model.)

, W. H. RANKIN.

MECHANICAL MOVEMENT;

Patented Feb. 24, 1885.

N. PETERS, Pholrrljlhagnphflr. Wnhinglcn. D. c.

Unrrnn STATES PAT NT Urrrcn.

\VILLIAM H. RANKIN, OF LAVVBENGE, MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 312.760, dated February24-, 1885.

Application filed January 2, 1835.

(No model I0 all whom it may concern:

Be it known that 1, WILLIAM H. RANKIN,

of Lawrence, county of Essex, State of Massachusetts, have invented anImprovement in Mechanical Movements, of which the followingdescription,in connection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

This invention has for its object the produclion of an improvedmechanical organization whereby an intermitting reciprocating movementmay be produced from a continuous roiary movement.

My invention consists in a frame, a slide-bar therein, a carriage or jawattached to the slidebar, and a rotating toothed wheel provided at oneside with cam projections to engage pins or projections of theslide-bar, combinedwith a pattern-cam, a shaft or stud on which it ismounted, and gearing between it and the said toothed wheel to move thepattern-cam, the latter movingthe slide-bar at predetermined intervalsin such manner as to place the pins at the side of the slide-bar nextthe cam of the toothed wheel in position to be engaged by the said cams,which latter then move the slide-bar.

Figure 1 is an edge view of a mechanical organization embodying myinvention; andFig. 2, a right-hand side view of Fig. 1, the main toothedwheel and one of the gear below it covering the pattern-cam being brokenaway to show the said cam.

In the drawings, A is a frame in a groove in which slides the bar B,provided at its inner side with aseries of pins, 2, (shown mostly indotted lines,) and at its front side with a pin, 3. The slide-'bar B hasthe carriage or jaw O loosely attached to it by the screws 4., extendedthrough slots in the carriage or jaw so as to permit end play of thecarriage or jaw on the bar. The carriage or jaw when moved by the barwill carry and move any other bar or device which is engaged or embracedby it. The jaw or carriage during part of its movement is guided by theguide-rod A, attached to frame A. The toothed wheel D, mounted on thestud D, carried by the frame A is herein shown as provided entirelyabout its periphery with a series of teeth, which for about one-fourthof the periphery of the wheel are longer in file direction of the axisof the wheel than are the remaining teeth, the longer teeth being shownat 6. The toothed wheel D has at one side a flange, 7, which is extendedabout three-fourths the distance about the wheel about opposite the baseof the teeth thereof. The frame'A. in a suitable ear, A receives a shortshaft, E, which has attached to it a pinion, E, and an arm, E having aconcaved face. The teeth of the pinion E correspond in number with thelong teeth 6 of the wheel D, and as the wheel D is rotated steadily bythe pinion D on the positively-driven rotating shaft D it happens thatthe pinion E is rotated once every time that the teeth 6 engage it, oronce during each full rotation of the wheel D.

As soon as the teeth of the wheel D run out i of mesh with those of thepinion the concaved face of the arm E", carried by the shaft E, meetsthe flange 7, and thereafter until the teeth 6 again arrive inengagement with the pinion E the said arm E and flange 7 co-operate toform a lock for the pinion and its shaft E. The shaft E, as hereinshown, has atooth, 10, which at each rotation thereof, by its engagementwith one of the series of teeth 12 of a gear or wheel, G, causes thesame to be rotated one step at a time, and, as herein shown, theperiphery of the wheel G is provided with semicircular concavities 13,which, co-operating with the part 14 of the shaft E, serve to lock thewheel G, except when the pin 10 acts on a pin, 12. The wheel G is looseon a stud, G, attached to the frame A, and to the wheel G, at its rearside, is attached the patternplate H, against the periphery of whichbears the pin 3 of the slide-bar B. WVhen the pin 3, during the rotationof the wheel G and pattern-plate, rests on the periphery of the cam,

. where the latter is of greatest radius, the bar B is movedsufficiently to place its uppermost pin, 2, at the rear side of the barin such position as to enable the point of the camf to pass under andengage the under sides of the said pins, the cam proj ections f f 3thereafter coming successively under the series of pins 2 2, the saidcam projections, by their co-operation with the several pins 2 2, &c.,acting to move the slide-bar and the carriage or jaw f 850., to passabove the pins 2 2, and the slide-bar and carriage or jaw O is left atrest.

To enable the slide-bar to rise and fall for the extent of the throwwhich may be imparted to it by the pattern-cam alone without lifting thecarriage or jaw, I have slotted the latter,

as at 5 5, so that the bar B may be moved its full throw by thepattern-cam in bringing the upper side of the screws 4 4 against theupper ends of the said slots. By changing the shape of the pattern-cam,or cutting away or notching its periphery for a greater or lessdistance, or by making the cam-surface of the pattern-cam against whichthe pin 3 rests more or less out of a true circle, the number ofreciprocations of the slide-bar at each rotation of the wheel G may bedetermined, or by the shape of the pattern-cam the slide-bar may bereeiprocated for any desired number of times in succession, or be leftat rest during any desired number of rotations of the wheel D, or beleft at rest for one or more rotations thereof, and then be operated forone or more rotations. The cam projection f forms part of a segmentalflange or projection, f (shown dotted in Fig. 2,) which is prolonged bya projection, f. The projections pp, &c., receive the pins 2successively and aid in permitting the gradual descent of the bar. \Vhenthe bar or slide is in its highest position, as in dotted lines, Fig. 1,the third pin 2 from the outer end of the bar will pass upon the thenupper side of the flange or projection f".

I ClilllI1-- 1. The. frame A, the carriage or jaw, the slide-barprovided with a series of pins, 2 2, and a rotating wheel provided withcam'projections to engage the said pins 2 and move the slidebar,combined with slowly-moving pattern-cam to act upon the said slide-barand place it in position to have its pin 2 engaged by the said camprojections, or in a position in which the said cam projections willpass 4 above the pins 2 and leave the slide-bar at rest,

substantially as described.

2. The continuously-rotating wheel D, provided with a series of cams toengage the pins or projections of and reciprocate a slide-bar out and inat each rotation of the said wheel, combined with a slowly-movingpattern-cam shaped to cause the pins of the slide-bar to be placed inposition to be engaged by the cam projections to move the slide-bar, orto pass by the said pins and leave the said slide-bar at rest.substantially as described.

3. The continuously-rotating wheel D, provided with a series of camprojections to engage pins or projections from a slide-bar, and acarriage or jaw slotted as described and connected with the slide-barloosely by means of screws, to permit a certain amount of lost motionbetween the carriage or jaw and the slide-bar, combined with aslowly-rotating pattern-cam shaped to cause the pin of the slidebar tobe placed in position to be engaged by the cam projections to move theslide-bar, or to pass by the said pins and leave the slidebar at rest,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence ot'two subscribing witnesses.

WILLIAM H. RANKIN.

Witnesses:

G. W. GREGORY, B. J. NoYEs.

